APA (7th ed.) Citation

Hartley. (1990). Online searching: Principles and practice. Bowker-Saur.

Chicago Style (17th ed.) Citation

Hartley. Online Searching: Principles and Practice. London: Bowker-Saur, 1990.

MLA (8th ed.) Citation

Hartley. Online Searching: Principles and Practice. Bowker-Saur, 1990.